Anonymous sources, so take it with a grain of salt
https://www.bloomberg.com/news/articles/2019-10-08/trump-enlists-former-lawmaker-gowdy-to-help-impeachment-fight
Donald Trump has enlisted former Representative Trey Gowdy to work with the White House team combating the U.S. House’s impeachment inquiry into the president, people familiar with the matter said on Tuesday.
Gowdy, a former prosecutor from South Carolina, is not formally joining the White House staff, according to the people. He was at the White House on Tuesday, according to one person who saw him there, before an eight-page letter was issued to House Speaker Nancy Pelosi declaring that Trump and the administration wouldn’t participate in the impeachment inquiry.
Gowdy rose to prominence leading a special House panel investigating the attacks on an American diplomatic post in Benghazi, Libya, while Hillary Clinton was secretary of State. The committee’s more than two-year-long investigation concluded in June 2016, in the thick of the presidential campaign, without substantiating any criminal behavior or misconduct by Obama administration officials. The probe was derided by Democrats as a political stunt intended to damage Clinton’s presidential campaign.